EP1988818B1 - Methode de diagnostic de blocage uretral - Google Patents

Methode de diagnostic de blocage uretral Download PDF

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Publication number
EP1988818B1
EP1988818B1 EP06821648.0A EP06821648A EP1988818B1 EP 1988818 B1 EP1988818 B1 EP 1988818B1 EP 06821648 A EP06821648 A EP 06821648A EP 1988818 B1 EP1988818 B1 EP 1988818B1
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Prior art keywords
acoustic
data
patient
transducers
urine flow
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EP06821648.0A
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German (de)
English (en)
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EP1988818A2 (fr
EP1988818A4 (fr
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Menashe Shahar
Ori Sahar
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P Square Medical Ltd
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P Square Medical Ltd
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B7/00—Instruments for auscultation
    • A61B7/02—Stethoscopes
    • A61B7/026—Stethoscopes comprising more than one sound collector
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/20—Measuring for diagnostic purposes; Identification of persons for measuring urological functions restricted to the evaluation of the urinary system
    • A61B5/207—Sensing devices adapted to collect urine
    • A61B5/208—Sensing devices adapted to collect urine adapted to determine urine quantity, e.g. flow, volume
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/43—Detecting, measuring or recording for evaluating the reproductive systems
    • A61B5/4375—Detecting, measuring or recording for evaluating the reproductive systems for evaluating the male reproductive system
    • A61B5/4381—Prostate evaluation or disorder diagnosis
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B7/00—Instruments for auscultation
    • A61B7/02—Stethoscopes
    • A61B7/04—Electric stethoscopes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B2562/00—Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
    • A61B2562/02—Details of sensors specially adapted for in-vivo measurements
    • A61B2562/0204—Acoustic sensors

Definitions

  • This invention is generally in the field of medical devices, and relates to a device and method for quantitative diagnosis of urethral blockage in patients.
  • Prostate enlargement is a widespread phenomenon developed in more than half men over age 50. By age 80, about 80% of men have enlarged prostates. The prostate enlargement is thought to be related to hormonal disorders typical to the age, and is termed Benign Prostatic Hyperplasia or BPH. In a minority of the cases, the prostate enlargement involves prostate cancer.
  • enlarged prostate may lead to bladder control problems. This is because the prostate gland encircles the urethra beneath the bladder neck. An enlarged prostate exerts pressure on the urethra which may deform its shape and reduce its cross sectional area. In acute circumstances, a total blockage of the urethra might occur.
  • a quantitative diagnosis of the urethral blockage can help in early detection of prostate problems, which in turn allows for anticipating medication or other appropriate treatment.
  • a quantitative diagnosis may help in determining severity of the case and in monitoring the effect of the treatment procedures been taken.
  • Lower Urinary Tract Symptoms may involve several factors, including disorders in the somatic nervous system, in the bladder/urethral autonomic nervous system, in the detrusor and in the sphincter muscles, and more. Said screening process is therefore a must for distinguishing between the plurality of medical situations that may cause a patient to experience urinary problems.
  • Facilitating and simplifying the recognition and the quantitative diagnosis of urethral blockage may therefore be essential not only in case a blockage does exist, but also in negating its existence in the opposite case thus leading toward a correct diagnosis.
  • the methods commonly used for quantitative detection of prostate condition include the following techniques: a digital rectal exam to feel for prostate enlargement; cystoscopy (under local anesthetic) consisting of passing a lens into the urethra and bladder to see if any abnormalities are present; intravenous pyelogram consisting of X-ray irradiation of the urinary tract as a dye is injected into a vein that shows up tumors or blockages; ultrasound test of the prostate.
  • TRUS Transrectal ultrasonography
  • TRUS Transabdominal ultrasonography
  • TRUS is significantly more accurate for determining prostate volume or the degree of urethral blockage, while Transabdominal ultrasonography can give an accurate measure of postvoid residual urine and is less invasive and expensive than TRUS.
  • Yet another known technique for quantitative detection of prostate condition is based on the uroflowmetry test. This is aimed at determining whether the bladder is obstructed, by electronically measuring the speed of urine flow. The test, however, cannot determine the cause of obstruction, which can be due not only to BPH, but possibly also to abnormalities in the urethra, weak bladder muscles, or other causes. According to this technique, the patient is instructed not to urinate for several hours before the test and to drink plenty of fluids so he has a full bladder and a strong urge to urinate. To perform this test, a patient urinates into a special toilet equipped with an uroflowmeter.
  • the rate of urine flow is calculated as milliliters of urine passed per second (mL/s). At its peak, the flow rate measurement is recorded and referred to as the Q[max]. The higher the Q[max], the better the patients flow rate. Men with a Q[max] of less than 12 mL/s have four times the risk for urinary retention than men with a stronger urinary flow.
  • the Q[max] measurement is sometimes used as the basis for determining the severity of obstruction and for judging the success of treatments. It is not very accurate, however, for a number of reasons: Urine flow varies widely among individuals as well as from test to test. The patient's age must be considered. Flow rate normally decreases as men age, so the Q[max] typically ranges from more than 25 mL/s in young men to less than 10 mL/s in elderly men. The Q[max] level does not necessarily coincide with a patient's perceptions of the severity of his own symptoms.
  • uroflowmetry may not necessarily teach of a blockage and/or of its severity unless the internal bladder pressure is also known. This is because on the one hand a low flow rate may be an indication of a detrusor problem rather than of a urethral blockage, while on the other hand a normally detected flow rate should not necessarily indicate of a normal urethra since it may result from extra abdominal/bladder pressures compensating against certain flow resistance caused by urethral blockage. Uroflowmetry combined with simultaneous measurement of internal bladder pressure is thus required in order to allow for discrimination between the different factors (i.e. the urethra flow resistance and the abdominal/bladder pressure).
  • Internal bladder pressure measurement involves however invasive procedure - inserting a catheter into the bladder. The inconvenience and infection risks accompanied to the procedure make its use rare and appropriate for special cases only.
  • U.S. Patent No. 6,063,043 discloses a passive acoustic method of detecting the presence or absence of vesicoureteral reflux in a patient. According to this technique, sound from the abdomen of the patient from a time just prior to the onset of urination in the patient is amplified, and then the presence or absence of an audio signal characteristic of vesicureteral reflux in the amplified sound is detected. The presence of the signal indicates the presence of vesicoureteral reflux in the patient.
  • U.S. Patent No. 6,428,479 discloses a technique of detecting prostate abnormalities such as cancer. This technique utilizes ultrasonic determination of the in-flow kinetics of contrast agent-containing blood in the prostate and/or observation of disease-related asymmetries in the spoke-like vascular pattern of the prostate.
  • WO 05/067392 discloses a rectal probe adapted for ultrasound and magnetic resonance imaging of the prostate.
  • This probe comprises an ultrasound imaging probe; an MRI probe; and a link joining the ultrasound probe and the MRI probe.
  • the MRI probe comprises a first magnetic field source for creating a static magnetic field in an MRI imaging region outside the rectal probe, a second magnetic field source for creating a time-varying magnetic field which excites nuclei in the MRI imaging region, and a receiver for receiving NMR signals from the excited nuclei and generating MRI imaging data indicative thereof.
  • WO 05/004726 describes a method of analyzing a Doppler flow image of a region containing a tumor, wherein the region includes a pelvis, adnexa uteri, a uterus, an ovary, a breast, a prostate, a hepatic artery, a liver and the like.
  • the Doppler flow image is represented as a three-dimensional flow representation; and at least one parameter characterizing a velocity spectrum of the three-dimensional flow representation is calculated, so as to determine malignancy likelihood of the tumor; thereby analyzing the Doppler flow image.
  • U.S. Patent No. 6,863,654 discloses a method of identifying a patient's urethral anatomic course in real time for the precise placement of a treatment element into the patient's prostate.
  • This technique utilizes a catheter containing an external, inflatable imaging bladder. The catheter is introduced into a urethra of the patient until the image bladder is generally aligned with a treatment site of the prostate.
  • An imaging probe of an imaging device is operatively positioned relative to the treatment site of the prostate and proximate portions of the urethra. The imaging device is activated so as to obtain a real time image of the treatment site of the prostate.
  • the imaging bladder is filled when needed to essentially turn on and define an acoustic interface between the interior of the imaging bladder and the urethral wall.
  • a boundary of the urethra is identified and viewed at the acoustic interface during placement of the treatment element so as to identify proper positioning thereof relative to the urethra.
  • RU 2224464 discloses a method using ultrasonic Doppler echometric examination of regional prostate blood circulation. Quantitative and qualitative indices are determined. According to this technique, chronic prostatitis is diagnosed by detecting pulsation index greater than 1.1 and venous blood circulation less than 4.5 cm/s relative to those of practically healthy people.
  • the article describes a model study for the determination of urethral obstruction based on turbulence measurements during urination. The measurements are performed with a microphone placed (extracorporeally) adjacent to the urinary tract. The analysis of the signals is performed in the frequency domain.
  • the present invention takes advantage of the fact that the urethral blockage causes the urine flow through a channel of a variable cross-sectional dimension, thereby resulting in a turbulence flow of the urine, which is of a differing nature than that of urine flow in normal urethras.
  • the inventors have found that such a turbulence flow of the urine generates acoustic rustles of unique frequencies in partially blocked urethras. Accordingly, the recognition of a rustle typical to a turbulent flow is indicative of the flow obstruction on the urine flow path through the urethra, the frequency and magnitude of which may be indicative of the blockage percentage range and of the distance between the transducer interface and the obstruction's location.
  • the present invention provides a system for the determination of urethral blockage according to claim 1.
  • a specifically designed positioning unit is provided for positioning the transducers in the vicinity of the patient's urine flow.
  • the control unit may include an amplifier for amplifying the electrical signal.
  • the control unit may include a filtering unit for suppressing background noise, as well as discriminating between signal components of different frequencies.
  • the filtering unit may be configured to separate from the electrical signal the wave components of a predetermined frequency range for the analysis while repealing the wave components of other frequencies.
  • Such filtering unit may be configured either to repeal background noises or to direct wave components of different frequencies for analysis through different algorithms.
  • the control unit is preprogrammed with a certain physical model based on the information (reference data) relating to frequency ranges associated with unique acoustic rustles expected to be generated by the urine flow in partially blocked urethras.
  • the model may utilize information relating to the magnitudes of acoustic waves in said frequency ranges.
  • the reference data includes different levels (at least two such levels) of acoustic waves' parameter(s) corresponding to different diseased conditions, respectively. The analysis of the received acoustic waves allows for determining the dynamics in the patient's condition.
  • the system developed by the inventors provides for a continuous analyzing of the urine flow acoustics during the urination. It should, however, be noted that it is not necessary to use the whole session information for the diagnosis. Any piece of the acoustic information acquired during the urination period may be selected and analyzed independently. Separate analysis of the selected portions of acoustic information of the same session may be compared before a final diagnosis is generated.
  • the system of the present invention requires no timing reference, other timing references may be of help.
  • the system of the present invention may be configured for synchronizing with the operation of an uroflowmetry system, such that the analysis of the electrical signal yielding from the acquired acoustic waves may concurrently involve data indicative of the urine flow rate measured by the uroflowmetry.
  • Such combined analysis of both the acoustic data and the urine flow rate data can be made on a continuous basis along the entire urination cycle under examination.
  • the transducer positioning unit may be configured so as to enable attachment of the transducer arrangement (its interface) to the patient body, thus receiving acoustic waves originated within the urethra after it has been transmitted through the body tissues.
  • This may for example be a piece of patch, or a ring-like arrangement to be mounted onto a penis.
  • the transducer positioning unit may be configured so as to enable placing the transducer arrangement (its interface) free in the air for receiving acoustic waves originated within the urethra through a free flow of urine in the air (i.e. by using the urine flow as a medium for transmitting the acoustic wave from its location of origin to a location outside patient's body).
  • This may for example be a ring-like element mountable onto a penis and carrying one or more transducers projecting from the ring so as to be in the urine flow path outside the patient's body.
  • the transducer positioning unit may have an adjustable fixation mechanism configured to attach the transducer(s) to a patient body so as to acquire acoustic waves generated in response to patient's urine flow.
  • the system for the determination of the urethral blockage condition is configured to determine various other parameters of the urine flow, e.g., the velocity profile.
  • the transducer arrangement may include acoustic transceivers (which may or may not be the same used for the urethral blockage condition determination) operating in the known Doppler-type measurement mode.
  • System 1 includes such main constructional parts as an acoustic transducer arrangement 2 including a plurality of acoustic transducers capable of at least receiving acoustic waves and generating an electrical output indicative thereof, and a control unit 20 connectable (via wires or wireless signal transmission) to the output of the acoustic transducer arrangement.
  • the latter is carried by a positioning unit (not shown here) to appropriately position the acoustic transducer arrangement 2 with respect to a region of interest.
  • the acoustic transducer arrangement 2 may include a plurality of acoustic transceivers.
  • the acoustic transducer arrangement 2 may be a passive unit (which is sufficient for the purposes of the present invention) thus including a plurality of acoustic receivers (microphones or accelerometers).
  • Such an acoustic receiver may be configured to provide an analog electrical output, or may be equipped with an analog-to-digital converter thus providing digital output indicative of the received acoustic waves.
  • the system may be configured to determine various urine flow related parameters other than the urethra blockage condition, for example the urine flow velocity profile.
  • the acoustic transducer arrangement may be configured and operable to implement Doppler-type measurements.
  • the principles of this type of measurements are well known per se and do not form part of the present invention and therefore need not be specifically described, except to note that in this case the transducer arrangement is configured as the so-called "active" unit capable of transmitting acoustic signals towards a region of interest and receiving reflections of these signals from the region of interest.
  • the control unit 20 is a computer system having inter alia a memory utility 20A (for storing certain reference data as will be described further below), a data processing and analyzing utility 20B (preprogrammed with a predetermined algorithm for analyzing data indicative of the received acoustic waves), and a control panel 20C with a display or any other data presentation utility.
  • a memory utility 20A for storing certain reference data as will be described further below
  • a data processing and analyzing utility 20B preprogrammed with a predetermined algorithm for analyzing data indicative of the received acoustic waves
  • control panel 20C with a display or any other data presentation utility.
  • transducer arrangement 2 is formed by four acoustic transducers, generally at 17 , arranged in a spaced-apart relationship to form a circular array around the region of interest, i.e., around the urine flow region. It should be understood that the invention is not limited to this specific example, and generally a plurality of acoustic transducers can be used.
  • a transducer positioning unit 10 which in the present example includes a ring-like shaped frame 11 and a plurality of radial shafts 12 (four such shafts in the present example) each passing through a respective aperture 13 formed in the ring frame.
  • Each shaft has a first end 15 outside the frame 11 and a second end 16 inside the frame 11.
  • Each shaft is provided with a plate-like member 14 facing the center of the ring shaped frame.
  • the shafts 12 are preferably moveable through the apertures 13 such that the location of the plates 14 relative to the center of the ring is adjustable by moving the shafts through the apertures 13.
  • the shafts may be held tight in the apertures due to a friction existing between the inner face of the aperture and the outer surface of the shaft contacting it.
  • the shafts may be provided with threading matching that of the apertures, thus the adjustment of the shafts through the apertures is by rotating the shafts like screws.
  • the shafts are spring biased so as to provide for automatic adaptation of the location of plates 14 to the dimensions of a body part to be sandwiched between each pair of them.
  • At least one of the plates may carry transducer 17 , and the other plates be used for the ring positioning around the body part.
  • each plate carries the transducer.
  • Transducer 17 is connectable to control unit 20. Considering wireless connection, transducer 17 and control unit 20 are equipped with appropriate communication utilities based on IR, acoustic, or RF signal transmission/reception. In the present specific but not limiting example, transducer 17 is connected through a wiring 18 , or through wires 19 passing through the shaft, to control unit 20.
  • the transducer positioning unit 10 is used by placing it on a patient's penis with the frame 11 circumferences the penis near penis's basis, and by adjusting the shafts to bring the plates 14 into contact with the penis so as the unit being gripped on it. At least one shaft with transducer 17 will preferably be contacting the penis from bellow, closer to the urethra.
  • the patient is requested to urinate, and so data indicative of the received acoustic waves produced by the urine flow is recorded and processed by the control unit 20.
  • the related information indicative of the urine flow condition is displayed.
  • the urethra blockage condition or various such conditions are identified as a corresponding change of the acoustic waves' parameter(s), such as intensity and/or frequency variation compared to reference data previously created and stored in the memory utility of the control unit. As indicated above, this change is caused by the turbulence nature of urine flow due to the urethra blockage.
  • Fig. 3 exemplifies the method of the present invention for the determination of the urethra blockage condition.
  • reference data is provided (step I).
  • the reference data is indicative of the acoustic waves, generated by the urine flow, as a function of frequency and time, for healthy and various different diseased conditions.
  • the reference data include such parameters for different groups of patients, for example of different ages.
  • Measured data from a specific patient, is collected (Step II). This measured data is indicative of the acoustic waves received by an array of acoustic transducers from different locations with respect to the urine flow region during the patient's urination. The measured data is in the form of the acoustic waves as function of frequency and time.
  • the measured data is processed utilizing the reference data (Step III).
  • the processing of the measured data includes analogue processing (Step IV) aimed at noise reduction and normalization to the reference transmission, and digital processing (Step V) of the so-obtained normalized signal in the frequency and time domain.
  • all acoustic signals are recorded by first pass through an analog digitizer so to store analog acoustic signal as a digital sequence of amplitude versus time vector.
  • analog acoustic signal is subject to further signal processing treatment and in particular an FFT (Fast Fourier Transform) filter can be employed in order to extract frequency and phase (compared to a given reference signal) from each signal belonging to each active element (each transducer).
  • FFT Fast Fourier Transform
  • the processed data is compared to the reference data and the comparison results, being indicative of the existence of physiological abnormalities and the degree of pathology, are displayed to the user, who may be a physician or the patient himself (Step VI).
  • patient group men of age above 55 who reported of micturition problems
  • reference group men of age below 30 reported no micturition difficulty
  • the acoustic equipment used for the experiment included a microphone or accelerometer (constituting an acoustic transducer), amplifier and a digital data recorder. It should be noted that the term “accelerometer” is only used here as an example and any other suitable acoustic component may be used.
  • an accelerometer may be placing it manually at the bottom of the penis as close as possible to the testicles. In this location, the urethra normally reaches its minimal distance from the penis exterior where a transducer (accelerometer) can be placed.
  • the accelerometer was connected to the input of the amplifier, the output of which was connected to the control unit (its data processor and analyzer utility); it should be understood that amplifier may alternatively be a constructional part of the control unit.
  • the amplifier has been adjusted to 30dB amplification.
  • Fig. 4 illustrates a graph representing the amplitude versus time of an electrical signal generated by the accelerometer in response to a 32-seconds acoustic wave it has acquired before, during and after the micturition of examinee No. 1.
  • Micturition starting and ending moments are indicated by vertical lines L 2 and L 3 , respectively.
  • the signals before line L 2 and past line L 3 are noise signals which include noises of placement and displacement of the accelerometer on the patient body.
  • a section of the micturition interval between lines L 2 and L 3 marked by horizontal line L 4 was picked for analysis. An expanded view of this section is depicted in Fig. 5 .
  • Fig. 5 illustrates an expanded view of a section from the graph illustrated in Fig. 4 .
  • the illustrated graph section represents the amplitude versus time of an electrical signal acquired by the accelerometer from the acoustic wave generated during the micturition of examinee No. 1, picked for analysis from the entire graph of Fig. 4 .
  • Fig. 6 illustrates a graph of the spectral power density in a dB scale versus wave frequency for the frequency range 0-3KHz, of the signal section illustrated by Fig. 5 .
  • Fig. 7 illustrates an expanded view of the graph illustrated by Fig. 6 for the frequency range 0-1Khz.
  • acoustic energy there is a remarkable concentration of acoustic energy in the frequency range around 200Hz, showing as a hill H 5 on the graph line of Figs. 6 and 7 .
  • Figs. 8 - 10 illustrate mutatis mutandis graphs similar to those illustrated by Figs. 5-7 , taken from the test of examinee No. 2 of the reference group (healthy examinee).As can be observed, no remarkable hill is recognizable in the graph taken from the test of the examinee of the reference group. A comparison between the two graphs leads to the conclusion that the remarkable energy concentration in the 200Hz frequency range in the graph of examinee No. 1 corresponds to a urethral blockage pathology possibly resulting from BPH of examinee No. 1.

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Claims (12)

  1. Système en vue de la détermination d'un blocage uréthral, le système comprenant :
    une disposition de transducteur (2) comprenant une pluralité de transducteurs (17) destinés à être placés à différents emplacements par rapport à un flux d'urine d'un patient comportant des emplacements espacés le long d'un pénis en vue de l'acquisition simultanée d'ondes acoustiques à partir desdits différents emplacements,
    la pluralité de transducteurs (17) étant apte au moins à recevoir les ondes acoustiques générées par le flux d'urine du patient, les ondes acoustiques issues de la pluralité de transducteurs formant des données acoustiques combinées ; et
    une unité de commande (20) en communication avec la disposition de transducteur (2), ladite unité de commande (20) étant configurée et actionnable en vue de la réception des données acoustiques combinées issues de la pluralité de transducteurs (17) auxdits différents emplacements, du traitement des données acoustiques combinées issues de la pluralité de transducteurs aux différents emplacements dans une fréquence et des domaines de temps et de l'extraction des données indicatrices des ondes acoustiques en étant issues, ainsi que de la comparaison des données extraites par rapport aux données de référence en vue de reconnaître un changement dans un paramètre des ondes acoustiques comparées aux données de référence créées préalablement et indicatrices d'une turbulence du flux dans la période d'urination, la turbulence étant indicatrice du blocage uréthral.
  2. Système selon la revendication 1, comprenant une unité de positionnement (10) en vue du positionnement des transducteurs (17) à proximité du flux d'urine du patient de sorte qu'une interface acoustique de chaque transducteur (17) est dans une position en vue de la réception d'ondes acoustiques générées par le flux d'urine du patient à chacun des emplacements le long du pénis.
  3. Système selon la revendication 1, dans lequel l'unité de commande (30) est pré-programmée pour la détermination d'un bruissement acoustique d'une fréquence de 20 à 1000 Hz.
  4. Système selon la revendication 1, dans lequel l'unité de commande (20) est pré-programmée pour la détermination d'un bruissement acoustique d'une fréquence d'environ 200 Hz.
  5. Système selon la revendication 2, dans lequel l'unité de positionnement de transducteur (10) comprend un cadre annulaire (11) en vue du montage sur le pénis du patient à un des différents emplacements le long du flux d'urine du patient.
  6. Système selon la revendication 5, dans lequel ledit cadre annulaire porte un arrangement circulaire des transducteurs.
  7. Système selon la revendication 5, dans lequel ledit cadre annulaire (11) possède respectivement un arrangement d'orifices espacés (13) et un arrangement correspondant de tiges (17) monté dans les orifices (13), chacuns formés avec un élément en forme de plaque (14) sur son embout distal à l'intérieur de l'anneau, au moins une des plaques portant un transducteur acoustique (17).
  8. Système selon la revendication 5, dans lequel ledit cadre annulaire (11) possède respectivement un arrangement d'orifices espacés (13) et un arrangement correspondant de tiges (17) monté dans les orifices (13), chacuns formés avec un élément en forme de plaque (14) sur son embout distal à l'intérieur de l'anneau portant un transducteur acoustique (17).
  9. Système selon une quelconque des revendications précédentes dans lequel la disposition de transducteur (2) comprend un ou plusieurs émetteurs-récepteurs acoustiques, le système étant configuré et actionnable pour exécuter des mesures de type Doppler d'un ou plusieurs paramètres du flux d'urine.
  10. Système selon une quelconque des revendications précédentes dans lequel au moins deux des transducteurs (17) sont configurés comme émetteurs-récepteurs acoustiques, le système étant configuré et actionnable pour exécuter des mesures de type Doppler d'un ou plusieurs paramètres du flux d'urine.
  11. Méthode en vue de la détermination d'un blocage uréthral, la méthode comprenant :
    la détection simultanée de signaux acoustiques à des emplacements espacés le long d'un pénis provenant d'un flux d'urine continu pendant une période d'urination, et la génération de signaux de sortie indicateurs des signaux acoustiques, les signaux de sortie issus des plusieurs emplacements formant des données acoustiques combinées ;
    le traitement et l'analyse des données acoustiques combinées dans un domaine de fréquence et un domaine de temps afin d'extraire des données indicatrices d'ondes acoustiques associées avec lesdits signaux acoustiques ; et
    la comparaison desdites données extraites indicatrices des ondes acoustiques à une donnée de référence créée préalablement pour reconnaître un changement dans un paramètre desdites ondes acoustiques comparées aux données de référence indicatrices d'une turbulence du flux dans la période d'urination, la turbulence étant indicatrice du blocage uréthral.
  12. Méthode selon la revendication 11, dans laquelle les signaux de sortie sont des signaux électriques et dans laquelle le traitement et l'analyse comprennent :
    l'exercice d'un algorithme prédéterminé sur les données acoustiques combinées afin d'extraire les données indicatrices des ondes acoustiques et étant comparable avec un critère prédéterminé ; et
    la comparaison entre les données extraites et le critère prédéterminé afin de reconnaître le changement dans un paramètre.
EP06821648.0A 2005-12-22 2006-12-20 Methode de diagnostic de blocage uretral Active EP1988818B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IL172754A IL172754A0 (en) 2005-12-22 2005-12-22 Urethral blockage diagnosis
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CN101495042B (zh) 2013-02-13
CN101495042A (zh) 2009-07-29
EP1988818A2 (fr) 2008-11-12
CA2634900A1 (fr) 2007-06-28
WO2007072484A2 (fr) 2007-06-28
US8231552B2 (en) 2012-07-31
RU2008132159A (ru) 2010-01-27
BRPI0621128A2 (pt) 2012-07-17
JP2009520560A (ja) 2009-05-28
US20080312538A1 (en) 2008-12-18
EP1988818A4 (fr) 2010-01-20
WO2007072484A3 (fr) 2009-04-23
CA2634900C (fr) 2015-06-09
US20080262389A1 (en) 2008-10-23
AU2006327554A8 (en) 2008-09-11
IL172754A0 (en) 2006-04-10
RU2451487C2 (ru) 2012-05-27
AU2006327554A1 (en) 2007-06-28

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